针对并网电能品质要求安全、可靠、快速性要求，提出了用变参数PID控制实现PMSG的背靠背式PWM中电流环及电压环的控制方案，该方法依靠参数数据库对被控对象进行参数辨识，从而提高风电机组的动态响应速度。在建立完整的数学模型基础上，用PSCAD/EMTDC进行并网仿真模型的搭建与仿真，结合IEEE14节点模型，对风电机组的并网特性进行了仔细的研究。仿真结果表明，PMSG的模型搭建合理，变参数PID控制策略对故障做出了良好的响应，系统低电压穿越性能显示良好，与分析结果一致。%According to the requirements of the power grid safety,reliability and rapidity,this paper proposes that the variable parameter PID control is used to realize the loop control of current and voltage ring plan on the PMSG backtoback PWM,so as to improve the wind generator dynamic response speed.Based on a complete mathematical model,it also uses PSCAD/EMTDC to structure and simulate the model and combined with IEEE14 node model of wind generator,researches on the characteristics of the gridconnection. The simulation results show that the PMSG model is set up reasonably,control strategies on faults are made have a good response,the system low voltage through performance is shown to be good and the results are consistent.
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